LXR linux/drivers/char/tpm/tpmrm-dev.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright (C) 2017 James.Bottomley@HansenPartnership.com
   4 */
   5#include <linux/slab.h>
   6#include "tpm-dev.h"
   7
   8struct tpmrm_priv {
   9        struct file_priv priv;
  10        struct tpm_space space;
  11};
  12
  13static int tpmrm_open(struct inode *inode, struct file *file)
  14{
  15        struct tpm_chip *chip;
  16        struct tpmrm_priv *priv;
  17        int rc;
  18
  19        chip = container_of(inode->i_cdev, struct tpm_chip, cdevs);
  20        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
  21        if (priv == NULL)
  22                return -ENOMEM;
  23
  24        rc = tpm2_init_space(&priv->space);
  25        if (rc) {
  26                kfree(priv);
  27                return -ENOMEM;
  28        }
  29
  30        tpm_common_open(file, chip, &priv->priv, &priv->space);
  31
  32        return 0;
  33}
  34
  35static int tpmrm_release(struct inode *inode, struct file *file)
  36{
  37        struct file_priv *fpriv = file->private_data;
  38        struct tpmrm_priv *priv = container_of(fpriv, struct tpmrm_priv, priv);
  39
  40        tpm_common_release(file, fpriv);
  41        tpm2_del_space(fpriv->chip, &priv->space);
  42        kfree(priv);
  43
  44        return 0;
  45}
  46
  47const struct file_operations tpmrm_fops = {
  48        .owner = THIS_MODULE,
  49        .llseek = no_llseek,
  50        .open = tpmrm_open,
  51        .read = tpm_common_read,
  52        .write = tpm_common_write,
  53        .poll = tpm_common_poll,
  54        .release = tpmrm_release,
  55};
  56